code4u.nl - dns.ninja

code4u.nl

DNSSEC🔒 Signed (DS record present)
A136.144.247.252🇳🇱 TRANSIP-AS136.144.128.0/17 TransIP BV Amsterdam, The Netherlands
PTR136-144-247-252.colo.transip.net
NSns0.transip.net ⭐
A2a01:7c8:dddd:195::195🇳🇱 TRANSIP-AS2a01:7c8::/32 TransIP B.V. Amsterdam IPv6 network
PTRns0.transip.net
A195.135.195.195🇮🇹 TRANSIP-AS195.135.195.0/24 TransIP B.V.
PTRns0.transip.net
NSns1.transip.nl
A2a01:7c8:7000:195::195🇳🇱 TRANSIP-AS2a01:7c8::/32 TransIP B.V. Amsterdam IPv6 network
PTRns1.transip.nl
A195.8.195.195🇳🇱 TRANSIP-AS195.8.195.0/24 TransIP B.V.
PTRns1.transip.nl
NSns2.transip.eu
A2a01:7c8:f:c1f::195🇳🇱 TRANSIP-AS2a01:7c8::/32 TransIP B.V. Amsterdam IPv6 network
PTRns2.transip.eu
A37.97.199.195🇳🇱 TRANSIP-AS37.97.128.0/17 TransIP BV Amsterdam, The Netherlands
PTRns2.transip.eu
MXmail.code4u.nl ⭐
TXTv=spf1 a mx ptr ip4:136.144.247.252 mx:code4u.nl -all
SOAns0.transip.nethostmaster@transip.nl 2021-11-28 #1

nl

DNSSEC🔒 Signed (DS record present)
NSns1.dns.nl ⭐
NSns3.dns.nl
NSns4.dns.nl
TXTnl zone update: 2026-08-02 21:00:01 +0000 (EPOCH 1785704401)
SOAns1.dns.nldns@sidn.nl 2026-08-02 #42

Previously MX for

mail.code4u.nl

Subdomains

mail.code4u.nl

Same first word

code4u.vn
code4u.org
code4u.ru
code4u.cn
code4u.co
code4u.co.il
code4u.com
code4u.net
code4u.nl
code4u.de

Similar names

deco4u.com
deco4u.de
4ucode.com
4educo.com
edoc4u.com

DNS History

7 records (5 active, 2 former)

201820192020202120222023202420252026NSns0.transip.netns1.transip.nlns2.transip.euns0.transip.nlns1.transip.netMXmail.code4u.nlA136.144.247.252
●NSns0.transip.net2026-04-23 → 2026-08-02 · 3 obs
○ 2018-08-12 23:26:34
● 2026-04-23 06:26:06
● 2026-08-02 22:05:14
○NSns0.transip.nl2017-02-03 → 2018-08-12 · 4 obs
● 2017-02-03 10:29:06
● 2018-08-12 23:26:34
○ 2026-04-23 06:26:06
○ 2026-08-02 22:05:14
○NSns1.transip.net2017-02-03 → 2018-08-12 · 4 obs
● 2017-02-03 10:29:06
● 2018-08-12 23:26:34
○ 2026-04-23 06:26:06
○ 2026-08-02 22:05:14
●NSns1.transip.nl2026-04-23 → 2026-08-02 · 3 obs
○ 2018-08-12 23:26:34
● 2026-04-23 06:26:06
● 2026-08-02 22:05:14
●NSns2.transip.eu2017-02-03 → 2026-08-02 · 2 obs
● 2017-02-03 10:29:06
● 2026-08-02 22:05:14
●MXmail.code4u.nl2026-04-23 → 2026-08-02 · 2 obs
● 2026-04-23 06:26:06
● 2026-08-02 22:05:14
●A136.144.247.2522026-04-23 → 2026-08-02 · 2 obs
● 2026-04-23 06:26:06
● 2026-08-02 22:05:14

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
nlns1.dns.nl, ns3.dns.nl, ns4.dns.nl-
code4u.nlns2.transip.eu, ns1.transip.nl, ns0.transip.net2 records

✅ Authoritative Response

Server:195.8.195.195

NS records: ns2.transip.eu, ns1.transip.nl, ns0.transip.net

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1135ms | Queries: -

📄 Records

TypeCountSample Data
A1136.144.247.252
NS3ns0.transip.net, ns2.transip.eu...
MX1mail.code4u.nl (pri: 10)
TXT1v=spf1 a mx ptr ip4:136.144.247.252 mx:c
SOA1ns0.transip.net hostmaster.transip.nl

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.transip.nl, ns1.transip.nl)

Analysis

Hierarchy

The domain mail.code4u.nl falls under the parent code4u.nl.

IP Addresses

code4u.nl directs to one IP number, which is 136.144.247.252.

There are other host names — 136-144-247-252.colo.transip.net among them — that share IP numbers with code4u.nl.

Name Servers

DNS for code4u.nl is handled by three authoritative name servers: ns2.transip.eu, ns0.transip.net and ns1.transip.nl.

At least some of code4u.nl's name servers are shared with other domains, for example bearlock.eu, goslide.io, vismania.nl and two more.

Three hostnames — ns2.transip.eu, ns0.transip.net and ns1.transip.nl — each have two IP addresses: ns2.transip.eu has 37.97.199.195 and 2a01:7c8:f:c1f::195, ns0.transip.net has 195.135.195.195 and 2a01:7c8:dddd:195::195, and ns1.transip.nl has 195.8.195.195 and 2a01:7c8:7000:195::195.

Mail Servers

code4u.nl routes its mail through a single mail server, mail.code4u.nl.